Drying cylinder for paper machines and textile-goods-drying machines



1,640,662 1927" E. LUTscHE DRYING CYLINDER F R'PAPER MACHINES ANDTEXTILE GOODS DRYING MACHINES Filed Dec. 24. 1926 number of suchcylinders are required Patented Aug. 30, -19:27.

UNITED STATES PATENT OFFICE.

EWALD LTJTTSCHEN, OF MUNICH,ZGERMANY= DRYING CYLINDER .E'OR PAPERMACHINES AND TEXTILEeGOODfiDRYING MACHINES.

Application filed December This invention relates to a drying cylinderfor paper machines and textile goods drying machines, and it has-for itsobject to condensate the steam more rapidly than at pres- 5 ent, and toeflect consequently a more rapid drying of a sheet of cellulose or offabric, for instance of a dyed wet-sheet of fabric, passing over anumber of such cylinders. Owing to the more rapid drying, a lesser inone machine, wherefrom results considerable economy in expense, ofspace, and of time.

This invention consists essentially in mounting a perforated sheet-metaldrum in the cylinder, and in means to maintain this sheet-metal drum atall points at the same but short distance from the inner surface of thecylinder. The injected steam is thus divided into thousands of very thinjets when it is passing through the perforations of the sheet-metaldrum, said jets flowing at increased velocity through the nozzle-likeperforations to strike against the inner wall of the cylinder, wherethey prevent the formation of a coating of water on this inner wall andensureconsequently a more perfect heat-exchanging between the steam andthe cylinder wall.

An embodiment of the invention is shown, by way of example, in theaccompanying drawings, in which I Fig. 1 shows a drying cylinder inlongitudinal section on line l--1 of Fig. 2.

Fig. 2 is a cross section on line 22 of Fig. 1.

= Fig. 3 shows a diagrammatic view and on smaller scale how the dryingcylinder is used in a paper machine.

The cylinder w has on its inner wallat each end an. inwardly projectingannular flange Zr, 1;. One journal 0 of the cylinder has a central bore03 through which steam is to be injected and this'journal is fixed bymeans ofa disk 6 on the annular flange b. The second journal 0 is fixedby means of a disk 0' on the flange b and it has a central bore dthroughwhich passes a pipe f for discharging the water from condensation. Onthe inner surface of the hub of journal '0' a scooper g is mounted and abeak-shaped tube h of said scooper extends to the inner surface of thecylinder to conduct the water from condensation into the dischargingpipe According to the invention a perforated sheet-metal drum 2' ismounted in the cylin- 24,1926. Serial No. 156,955.

del a at a very short distance from'the inner surface of said cylinder.This sheet-metal drum z is made from a strip of perforated sheet metalwhich is ratherthin and of such width that it just tightly fits betweenthe two annular flanges b, b of the cylinder at. This sheet-metal strip,when being inserted into the cylinder, is wound up in spiral shape sothat it can be inserted between the annular flanges b and 1) before thebuilding in of the corresponding journal. In the cylinder a the rolledup sheet metal strip is unwound to form a drum the joining edges 79* ofsaid strip being then connected by soldering. The sheet metal strip isof such length that'the outer diameter of the drum made from said sheetmetal strip is very little shorter than the inner diameter of thecylinder. On the inner surface-of the cylinder w blocks m are fixed atsuitable distances apart in order to keep the drum 2' at uniformdistance from the inner surface of the cylinder. The blocks m may alsobe fixed on the outer surface of the drum 21. i

The steam which flows through the perforations of the drum 2' andstrikes against the inner wall of the cylinder a condenses very rapidlyand consequently the heat ofsaid steam is very rapidly transferred tothe cylinder a, so that in one paper machine only about half the numberof drying cylinders is required as are actually necessary. In order todry a cellulose sheet n guided over guide pulleys o "as shown in Fig. 3,twenty-four drying cylinders a are actually required, only 12 suchcylinders, improved according to the invention by a perforated drum,being sulficient to dry the same cellulose sheet at the same timeandwith the same amount of steam. When the same'number of dryingcylinders is used in one machine as at present, the cylinders can rotateat double the speed as at present, so that the efficiency of the machineis doubled. ;The same results are obtained in drying sheets of fabricwhich come from the dye-bath.

I claim v A drying cylinder for paper machines and drying machines fortextile goods, comprising in combination with the cylinder proper,

two annular flanges inwardly projecting to form a drum, a number ofspacing blocks between the'outer surface of said perforated of saidcylinder the inner end of said journal forming a disk fixed on thecorresponding annular flange ofthe cylinder a hollow journal in theother end Qfsaid cylinder the inner end of said journal formingadiskfixed on the corresponding annular flange of the cylinder, a scooperon the inner end of said second mentioned journal, a discharg ing pipeextending from said scooper through said hollow journal, and a scoopingtube extending from said scooper to the in ner wall of said cylinder forcollecting the waterv from condensation.

In testimony whereof I afiixmy signature.

' EWALD LI ITSCHEN.

